Originally Posted by Tbird
Just received an Edelbrock Performer RPM Air Gap intake for a 351 windsor today. I have noticed that some of the RPM intakes have a milled down area in the plenum divider but mine does not. I am considering milling it down as this has shown benefit in the lower RPM range with improved torque/HP with a dyno test I read recently. What do you all think? If so, what are the dimensions: depth and width from those who have an RPM intake with the milled plenum divider. My carb will sit on a 5/16"insulator spacer.
The Ford RPM AG isn't milled, as you've seen. You can somewhat duplicate the effect of cutting the plenum by using a thin, open spacer to see if your combo responds to sharing both sides of the intake without having to commit to cutting yours sight unseen.